CORS issue fastly

Error :

if (obj.status == 601) {

  

  # Standard response to a preflight does not have a response

  # body, so a 204 No Content is appropriate, though you can

  # also send a 200 OK, that works too.

  set obj.status = 204;

  set obj.response = "No content";

  if (req.http.Access-Control-Request-Headers) {

    set obj.http.Access-Control-Allow-Headers = req.http.Access-Control-Request-Headers;

  }

  # Echo the requested origin back to the client.  You may like to

  # check this against an allowlist of origins instead of blindly

  # allowing potentially dsestructive requests from any origin

  set obj.http.Access-Control-Allow-Origin = req.http.Origin;

 

  # Client may use this preflight response to authorise future

  # requests that would otherwise also require a preflight, so

  # to maximise reuse, we'll list all allowed methods here, not

  # just the one that was requested. (think carefully before

  # adding 'DELETE' to this list!)

  set obj.http.Access-Control-Allow-Methods = "GET,HEAD,POST,OPTIONS";

 

  # Setting a cache TTL on the response allows the client to use

  # this preflight response for other requests.

  set obj.http.Access-Control-Max-Age = "86400";

 

  return(deliver);

}

Recv:

if (req.method == "OPTIONS" && req.http.Origin && (req.http.Access-Control-Request-Method || req.http.Access-Control-Request-Headers) ) { error 601; }